Piston-ring holder



Dec. 25 1923.

C. BARCHUS PIsToN RING HQLDER Filed Dec. 31. 1921 A TTOIM'EYSA llllll ..LUHIIIIIH WIT/VE Patented Dec. 25, 1923.

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CHARLES BARCHUS, 0F NATCHEZ, MISSISSIPPI.

Piemon-RING HOLDER.

Application ledDecember 31, 1921. Serial No. 526,303.`

To all 'whom t 'may concern:

Be it known that I, CHARLES BARorrUs, a

citizen of the United States, and resident` of Natchez, in the county of Adams and State of Mississippi,have invented certain new and useful Improvements in Piston- Ring Holders, of which the following is a specification.

This invention relates to piston ring contracting devices especially adapted for use when inserting pistons into cylinders. y

An important object of this invention is to provide a ring attaching device embodying a band adapted to be arranged about a piston so that the piston may be readily in- `serted into the cylinder without interfen ence by the piston rings.

Further the Vinvention forming the sub n ject matter of this application aims to provide a piston ring contracting device having novel means whereby the same may Y be rapidly adjusted for use in connection with pistons of various sizes.

A further object is to provide a piston ring contracting device which is simple to operate, of highly simplied construction and cheap to manufacture.

Other objects and advantages of the in-` vention will be apparent during the course of the following description.

In the accompanying drawing forming a part of this application and in which like numerals are employed to designate like parts throughout the same, y

Figure 1 is a plan view ofthe device, parts being shown in section.

Figure 2 is a fragmentary side elevation of the same. y, A

Figure 3 is a fraomentary perspective of a piston engaging and and the nut connected to they ends of the band.

Figure 4 is a'horizontal sectional view taken on line 4-4 of Figure` 1.

Figure '5 is a perspective of a spacing block embodied in the invention.

Inthe drawing` wherein for the purpose of-illustration is shown a preferred embodiment of the invention the `numeral 5 designates a tubular casing which as illustrated in Figure 4 is rectangular in cross section and receives a feed screw 6, the said feed screw being provided with a hand wheel 7 forming a means whereby ythe screw may be rotated for operating a ring contracting band 9. The feed screw 6 is held against longitudinal movement with relation to the casing by means of a stop element 11 secured within the rear portion of the casing by means of screw bolts 12 or the like. The rear portion of the screw is somewhat reducedto .form an annular shoulder 14 which contacts with the forwardfside of the stop element 11. The forward portion of the feed nut isy formed with a reduced member received within a socket 16 in a spacing head 17. The spacing element or head l? is received within the forward portion of the casing and is detachably held in position by means of screw'bolts 18. It is thus seen that the spacing head 17 forms a means to limit the forward movement of the feedy screw while the stop element or head 11 limits the rearward movement of the feed i SCISW.

As illustrated in Figure 3 the ends of the band 9 are connected to a feed nut 20 by fastening devices 21. The feed nut 2O` isin turn threaded` on kthe feed screw 6 so that when the feed screw is rotated the nut will beadvanced or retracted. The band 9 is of a 'highly flexible flat spring metal andisr `reduced as indicated at27 and flatly yconf tact with theopposed sides of the flanges `24 whereby the feed` nut is held against rotation.

As illustrated in Figure 1 the major porcasing to form a loop adapted for encirclinga piston ring and the vadjacent por- 4tion of the band is extended beyond the tion of the `piston and when the feed nut 20 is drawn rearwardlv the loops thus formed will vbe contracted for contracting the piston ring, ,whereby` the same may be freely inserted into the cylinder. The sides` ofthe spacing` head 17 `are curved transversely as indicated atBO so as to direct the sides of the band 9 outwardly into circular formation.

The `extended portion of theV band 9 is maintained in looped formation by means of a somewhat stout though suiiciently flexible arcuate spring 33 having its intermedia-te portion provided with attaching ears Se secured to the casing by means of the `screw bolts 18. The arcuate spring 33 flatly contacts withrthe inner side ofthe ring attaching -loop and thereby holds the extended portion of the band in the form of the loop. The arcuate spring 83 is sufficiently yieldable to permit the extensible loop to be varied in size.

In operation the extended-portion of the band 9 is extended about `the piston ring at the adjacent portion of the piston and the nut is thus contracted soasto hold the band orloop in place. rThe piston is now inserted into the cylinder andas the rings are contracted the ringswill not-interfere withvthe movement .of the `piston into the cylinder. .The loop is of a thine-metal and I therefore provide the Ysamefwith oppositely arranged knobs i() which contact with the=lower end ofthe cylinder so as to ,prevent the' band from sliding into the cylinder and thereby occupying the space into which the piston should pass.

Havingthus described the inventionfwhat lclaim is l. A ring attaching device comprising a casing, a feed member arranged therein, a flexible bandihaving its endssecured to said feed :member and `having its intermediate portion extended beyond the casing 'to form airing engaging-loop, and an' arcuate spring connected tosaid casing and received within said Iloop.

2. A ringattaching device comprising a casing, a feed nut arranged therein, a flexible band having its ends secured t'o said lfeed nut and having its intermediate por ticnextended beyond the casing to form a ring engagingloop,operating means for said nut, and ani-arcuate spring received within said loop and havingvears connected to'said casing.

3. -A ring attaching device comprising a casing, a feed nut arrangedtherein, a band of spring metalhaving its ends secured to said l nut, the sides of said band being in contact with'the sides 'of said casing and being extendedbeyond the casing to 4form a ring engaginglo'o'p, an operating device for `said n'ut, and Aan arcuate `member, connected to said casing 'and engaging"thatl portion of the band exteriorly ofthe casing whereby 'to maintain the'same in the Aformof a loop.

.4. A ring attaching device comprising a casing', a feed'nut arrangedtherein, a band of spring metal havingits endssecured to 'said nut, the intermediate portion ofsaid band being extended beyond thleicasing to form a ring engaging loop, an operating device for said feed nut, and an arcuate spring member received in said loop and connected to said casing. Y

5. ring-attaching device comprising a casing, a feed nut arranged therein, a band -of's'aid band being 'firmly in contact with the sides of said 'casing and being extended beyond the casing to form. a ring engaging loop, an operating device for said feed nut,

an arcuate spring member received in said loop and connected to said casing, a spacing device arranged at the forward end of said casing between the sides of said band, and guiding means forthe sides of said band.

7. A ring attaching device comprisinga casing, al feed nut arranged thereiina band of spring metal having its ends secured to said nut, the intermediate portion :of the Ebandbe'ing extended beyond the casing to form a ring engaging loop, an operating device for said feed nut, an arcuate member received in said yloop and connectedto said casing, a spacing device arranged at the forward end of said'casing between the sides of said band, guiding means for the sides of said band, the operating device for said feed nut being in the nature of a feed screw terminating beyond vthe rear end of the cas ing and formed with a hand wheel.

8. A ring attaching device comprising a casing, a band extending into thecasing, a feed device movable in said vcasing and having connection `with said band, and means whereby to maintain that portion of the band exteriorly of the casing approximately inthe form of a loop.

r9. Aring attaching device comprising a eas1ngr,a band extending into the casing, a feed device'niovable 1n said casing and having connection with said band, and means whereby to maintain .that `portion of `the band lexteriorly of the casing approximately inthe form of aloop, said means consisting of an arcuate body connected intermediate its endsjto the` casing.

` CHARLES BARoHUs. 

